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by throw_away_8080 1235 days ago
I love when primality is useful. Like cicadas. But 9 is not prime.
2 comments
mLuby 1234 days ago
Whoops I meant to write 11, not 9. I haven't actually heard of an 11-bladed screw, though here's a picture of an 11-bladed pumpjet. https://youtu.be/ugSEIiTZ1Pg?t=386
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wruza 1234 days ago
In wartime it is, and also equals to pi squared.
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